Patent GB-1037200-A (GB)
Title: Improvements in or relating to stockings and methods and machines for production thereof
IPC: D04B9/46
Filed: 1964-08-06
Abstract: A stocking is knitted from the toe upwards on a rotary cylinder machine and is commenced by knitting a few make up courses on spaced needles and by retaining loops of one of the initial courses on welt hooks.  The toe is thereafter knitted on spaced needles with the welt hooks continuing to hold their loops such that a tubular loop of fabric 272, 274, 276, Fig. 16, (not shown), is produced, the portions 272 and 276 being knitted of a heavy gauge yarn whilst the middle portion 274 is knitted of a lighter gauge yarn.  The welt dial is then held stationary in relation to the needle cylinder such that a twist is imparted to the tubular fabric, the actual twisting being somewhat confined to that p  portion 274 knitted of the lighter yarn with the result that the tubular portion is virtually closed at one end, Fig. 17, (not shown).  The welt instruments then transfer their loops back to the needles and the rest of the stocking is knitted. The toe thereby formed has a double layer portion closed at the point by the twisted portion.  A ring toe is formed with run resistant stitching whereafter the foot and leg of the stocking is then knitted.  The welt is completed by the welt hooks withholding loops whilst knitting continues on the needles and finally transferring the loops back to the needles.  A few courses are then knitted before the fabric is cast off, these few courses rolling up on themselves when the fabric is cast off and forming a small bead around the lower edge of the welt by virtue of which the loop structure avoids running back and unravelling of the fabric.  The fabric is assisted in its take down from the needles by nozzles 56, Fig. 1A, (not shown), directing air on to the fabric as it is formed, and a suction being created at the lower end of the cylinder.  Needle selection is relieved for the production of the make up courses for the toe by pivotable multi tooth butt jacks.  The dial receives its drive from the main drive shaft through bevel gearing 170, 168, 162, 156, Fig. 1A, (not shown). The bevel gear 156 is mounted on a sleeve 150 and which drives a collar 126 through a retractable pin 130 mounted in the collar.  The collar is keyed to the shaft 122 on which the dial is mounted so that as long as the pin 130 remains in engagement with the sleeve 150 the dial continues to be rotated.  However when it is desired to effect the twisting of the fabric and the closure of the toe, a collar 136 is raised by a control lever 144 and lifts the pin 130 out of engagement with the sleeve 150. Simultaneously a brake 184 is applied to the edge of the collar 126 with the result that it is retarded and stopped rendering the dial stationary.  The continued movement of its cylinder effects the twisting action and on completion the brake is released and the pin 130 re-engaged with the sleeve 150.  The extent of the relative movement of the dial and cylinder is desirably 360 degrees although 180 degrees movement would suffice.  In the first case the welt hooks are repositioned over the same needles and loop transfer can then take place to repossess the needles with its initial course loops whereafter normal knitting is resumed.